Because the self-sabotagers truly believe they are worthless and bad, they don’t believe they deserve to succeed. Logically, bad people should not succeed. They need to be punished. So they sabotage themselves. If they want love, they find it with an abusive partner who will punish them. If they want a promotion at work, they will make important mistakes and watch as a someone else gets the job.
It takes a lot of interior contemplation to find and root out any hidden messages that we absorbed when our minds were like little sponges. If we allow these programs to fester deep within, we will always find a way to “lose” instead of win.